Abstract
Objectives
To assess the effect of adding solid manure fractions on the biomethane potential (BMP) of liquid dairy cow manure and on the biokinetic parameters of the process.
Results
The methanogenic potential of liquid dairy cow manure was strongly effected by adding a solid manure fraction. The 90/10 % (w/w) liquid/solid manure fraction mixture was the best substrate for CH4 production. This substrate mixture improved by 50 % the final CH4 production per g substrate and decreased the lag time by 220 % relative to the reference BMP test without the addition. Moreover, the addition of 20 % solid manure fraction adversely affected both the final CH4 production and the maximum methane production rate, while increased the lag time by 400 % compared to the reference BMP test without addition.
Conclusions
Liquid dairy cow manure should be supplemented with no more than 10 % of solid manure fraction in order to improve the biomethane potential of this important agro-industrial residue.
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Acknowledgments
This work was performed under the financial support of VAZAECO SOC. COOP. de C.Y.L. Ivonne Figueroa-González gratefully acknowledges the financial support received from the National Council for Science and Technology of Mexico (CONACyT, Grant 203571).
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Díaz, I., Figueroa-González, I., Miguel, J.Á. et al. Enhancing the biomethane potential of liquid dairy cow manure by addition of solid manure fractions. Biotechnol Lett 38, 2097–2102 (2016). https://doi.org/10.1007/s10529-016-2198-9
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DOI: https://doi.org/10.1007/s10529-016-2198-9